Necticut



J. T. BOLTON.

WEB STRETCHING AND GUIDING DEVICE.

APPLICATION FILED NOV. 15. 1918.

Patented June 15, 1920.

2 SHEETS-SHEET 1.

J. T. BOLTON.

WEB STRETCHING AND GUIDING DEVICE.

APPLICATION FILED NOV. 15. 1918.

2 SHEETS-SHEET 2.

attain;

Patented June 15, 1920.,

UNITED STATES PATENT OFICE.

JOHN T. BOLTON, OF NEW HAVEN, CONNECTICUT, ASSIGNOR OE ONE-HALF TO THEFORSYTH DYEINGCQ, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CON-NECTICUT.

WEB STRETCHING AND GUIDING DEVICE.

Application filed November 15, 1918.

To all whom it may concern:

Be it known that I, JOHN T. BoL'roN, a citizen of the United States, andresident of the city of New Haven, in the county of New Haven and Stateof Connecticut, have invented certain new and useful Improvements in WebStretching and Guiding Devices, of which the following is aspecification.

This invention relates to web-stretching and guiding devices foroperating upon webs or strips of different materials such as cloth,paper, or the like, while being fed to a ma chine such for instance as atenter, calender, drier, printing machine andthe hire, to besubsequently operated upon, and fills 1nvention is an improvement on myprior Patents Numbers 1,237,607 and 1,262,710.

The object of this invention is to simplify the construction of thedevice and increase its operating efliciency over others of thischaracter.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully de scribed, andparticularly pointed out 1n the appended claims.

In the accompanying drawings:

Figure 1- is a front view illustrating a traveling web of material withmy improved stretching and guiding device applied to opposite edgesthereof.

Fig. 2- is a top view illustrating the op erating roll as having itsaxis set at an angle to. the normal plane of the traveling web so thatthe deflection of the web from such plane is gradual.

Fig. 3- illustrates the setting of the sons of the roll on an angle tothe plane of the web, and also shows the guide rods as set on an angleto the axis of the roll for the purpose of causing a gradual increase ofthe extent of the surface contact of the web upon the roll.

Fig. 1 shows the axis of the guide rods as being set on an angle to eachother c011- ver ing toward the free end of the roll.

5- is a sectional end view on line 5-5 of Fig. 4, showing the innerportion of the guide bars as arranged to cause the minimum amount ofsurface contact of the web upon the roll adjacent its free end.

Fig. 6- is a section on line 6---6 of Fig. 4, illustrating the outerportion of the guide bars arranged to cause the maximum amountSpecification of Letters Patent.

Patented June 15, 1920.

Serial No. 262,718.

of surface contact of the web upon the roll at a polnt farthest from itsfree end.

Flg. 7- is a side elevation showing a portion of the roll, and thefeeler member mounted on the roll frame and arranged to operate thepositive stop for the roll.

Fig. 8- is an end View showing the roll and the feeler-member, also thecam which 'lifts the feeler out into position to be enhaving engaged theweb to hold the stop arm in position to be engaged by the stop pin onthe roll to positively arrest the rotation of the latter.

It is found in practice where the direct engagement of the feelerfingers with the web is relied upon to arrest the rotation of the roll,that unless the edge of the web extends a considerable distance into thegrip of the fingers the web is likely to draw away and slip out withoutstopping the roll, and so impair the sensitiveness of action of thedevlce. To overcome this difficulty I have in my present inventionprovided a positive stop for the roll, which is operated by a very lightpressure of the end of the feeler arm upon the surface of the web, thisstop being quite independent of any gripping action upon the web. I r

. To accomplish this result in a simple and practical way, I havemounted a pair of rolls 12, each to freely rotate on its fixed shaft .13and I have shown one-half of the surface 14 of the roll as beingroughened and the other half 15 as being smooth but any other suitablearrangement of roll may be employed. The outer end of this shaft isfirmly held by set screws in the bearing 16, which bearing is providedwith a trunnion 17 extending at a right angle therefrom, see Fig. 2,passing through and fixed in another bearing 18, the latter beingsupported by bearings 19 and 20 fixed to the standard 21 rising from theframe 22.

By this arrangement of mechanism the axes of these rolls may be set atany angle relative to each other and also relative to the surface of thetraveling web.

In order tocontrol the extent of contacting surface of the web upon theroll, I have provided a pair of guide rods 23 and 24 made somewhat inthe form of a hair pin, the

spaced ends of which are supported, one in the upper bearing 25 and theother in the lower bearing 26, both of which bearings are supported fromthe middle bearing 27 on the main shaft 13, by which construction theends of these guide rods are held spaced apart and in proper operatingrelation to the roll 12.

One feature of my present invention is that 'I set the axes of theseguide rods at an angle .to the axis of its roll, as best illustrated inFig. 3, whereby the extent of the contacting surface of the web upon theroll at its endis very light and gradually increases from this free endoutwardly toward the outer end thereof. Then again to further controlthis extent of bearing surface of-the web upon the roll I set theseguide rods so that their axes converge toward the free end of the rollas best illustrated in Fig. 4, thus again assisting in minimizing theextent of contacting surface of the web upon the free end of the roll,which effect is further illustrated in Fig. 5.

An essentialfeature of this invention is the construction andarrangement of the positive stop device which is controlled in itsoperation by action of the feeler member.

This feeler member comprises a plate 27 pivotally mounted on the upperguide rod 23, the lower end of the plate being formed into an arm 28 toengage the surface of the web, while the inner edge of the plate isprovided with the contact portion 29 arranged to engage the cam 30,which cam is connected to rotate with the roll 12. Rearwardly extendingfrom the upper portion of this plate is a stop arm 33 which is providedwith a stop pin 31 adapted to contact with the stop pin 32 on the rollwhen the end of finger 28 rests upon the surface of the traveling web a,as illustrated in Fig. 10.

In the operation of this feeler member the contact portion 29 isnormally held against the surface of the cam 30 by action of the spring34, one end of which spring is connected to the adjustable collar 35while its opposite end engages the boss 36 on the feeler plate. By thisaction the stop arm 33 with its pin 31 is raised permitting the stop pin32 on the roll to pass thereunder and'after this roll pin has passedbeneath the arm pin, cam 30 begins to move arm 28 outwardly so that theedge of the fabric when spread or deflected excessively, will extendbeneath this feeler arm 28 and so retain the arm pin 31 in the path oftravel of roll pin 32 thereby providing positive means for arresting therotation of the roll with its smooth surface to the web, in which casethe edge of the traveling web naturally draws inwardly from itsexcessive deflection disengaging the arm 28 and permitting it underaction of the spring 34 to move inwardly and cause the stop pin 31 toagain be controlled in its position by action of the cam 30 upon thefeeler member.

By this construction it will be seen that the feeler member is adaptedto operate with its maximum sensitiveness upon the lightest and mostdelicate fabric, which is not the case where the body of the fabricitself is depended upon to serve as a stop for an resting the rotationof the spreader roll against the friction of the fabric being drawnthereover.

In some instances particularly where delicate fabrics are being operatedupon whose surfaces have a highly starched finish it is found to be ofadvantage to set the axes of the guide rolls at an angle to the normalsurface of the traveling web engaged by them, so as to prevent a sharpbend in the fabric at the point where it contacts with the end of theroll. In this way the end of the roll engages the fabric very lightlyand is caused to present a gradually increasing contact surface to thefabric.

By my improved web-stretching and guiding device I am enabled to handlethe most delicate fabrics without injury. The device is extremelysensitive and by its use the stretching of the web is nicely controlledThe foregoing description is directed solely toward the constructionillustrated,

but I desire it to be understood that I reserve the privilege ofresorting to all the mechanical changes to which the device issusceptible, the invention being defined and limited only by the termsof the appended claims.

I claim:

1. In a web-stretching and guiding device, a roll mounted to work incontinuous contact with and be rotated by the traveling web, means forguiding the web partially around said roll, means whereby the rotationof the roll exerts a spreading action on the web, a stop independent ofthe web, and a feelcr moved by an excessive lateral movement of the webto engage said step and positively arrest the rotation of said rollwhile still in contact with the traveling web.

2. In a web-stretching and guiding device, a roll mounted to be rotatedby contact with the traveling web, a pivotally mounted 'feeler member, acam operated in time with feeler member having an arm extending into thepath of travel of the web when deflected excessively, a cam operated intime with the roll for positioning the arm to engage the web surface,and a stop member positioned by engagement of the feeler with the web topositively arrest the rotation of the roll.

4. In a web-stretching and guiding device, a roll mounted to rotate bycontact with the traveling web, a spring pressed feeler'member pivotallymounted and having a webengaging arm and a roll stop arm, a cam forlifting the web arm into web-engaging position, and a stop on the rollto engage the stop arm to arrest the rotation of the roll when the webis engaged by the web arm.

5. In a web-stretching and guiding device, a roll having opposite roughand smooth surfaces and mounted to be rotated by surface contact withthe traveling web, a feeler member arranged to engage the surface of theweb by spring pressure when the web is excessively deflected, a positivestop, and means whereby the engaging of the web by said feeler causessaid stop to arrest the travel of the roll with its smooth surface tothe web.

6. A web-stretching and guiding. device comprising a pair of rotatablerolls adapted to engage opposite edges of the traveling web, each rollhaving opposite rough and smooth surfaces, a feeler member for each rollarranged to engage the surface of the web by spring pressure when theweb is excessively deflected, a stop for each roll, and

means whereby the engaging 0f the web by said feeler positions said stopto positively arrest the travel of its roll with its smooth surface tothe web.

7. In a web-stretching and guiding device, a roll mounted to be rotatedby contact with the traveling web, the axis of said roll being set at anangle inclined to the plane of the normal surface of the traveling web,and a guide-bar for controlling the extent of surface contact of the webwith the roll.

8. In a web-stretching and guiding device, a roll'mounted to be rotatedby contact with the traveling web, the axis of said roll being set at anangle inclined to the plane of the normal surface of the traveling web,and a guide-bar set at an angle to the roll axis for graduallyincreasing the extent of surface contact of the web upon the rollinwardly from its free end.

9. in a web-stretching and guiding device, a roll mounted to be rotatedby surface contact with the traveling web, a pair of web guide barsadjacent the roll set at an angle to the axis of the roll, the axis ofsaid guide bars also being set at an angle to each other convergingtoward the free end of the roll whereby the extent of the contactingsurface of the web upon the roll is gradually increased from the freeend of the roll inwardly.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN T. BOLTON. Vitnesses:

L. E. FonsY'rrr, C. A. BRADLEY.

